fast/images/decode-render-animated-image.html [ ImageOnlyFailure Pass ] Most of the times it passes, but sometimes it fails on the first run or both. The images when it fails can be seen here https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20(Tests)/r239824%20(9332)/fast/images/decode-render-animated-image-diffs.html